| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical low pass filter which can be manufactured without requiring much cost and labor and to which antireflection processing having a low reflectance and a low reflectance wavelength dependency is applied and to provide a manufacturing method or the like of such an optical low pass filter. SOLUTION: The optical low pass filter 1 obtained by photopolymerizing a photopolymerizable composition is provided with a sheet-like matrix 2 and a plurality of columnal structures 4 aligned in one direction in the matrix 2, regularly and two-dimensionally arranged in a face orthogonal to the thickness direction of the matrix 2, having a refractive index different from that of the matrix 2, and having an aspect ratio of 10 and more; wherein the refractive index is periodically changed at 80 nm or 1,000μm and fine rugged structure is formed at least on one surface. COPYRIGHT: (C)2009,JPO&INPIT
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